// adds all displacement faces as a series of convex objects
// UNDONE: Only add the displacements for this model?
void Disp_AddCollisionModels( CUtlVector<CPhysCollisionEntry *> &collisionList, dmodel_t *pModel, int contentsMask )
{
int dispIndex;
// Add each displacement to the grid hash
for ( dispIndex = 0; dispIndex < g_CoreDispInfos.Count(); dispIndex++ )
{
CCoreDispInfo *pDispInfo = &g_CoreDispInfos[ dispIndex ];
mapdispinfo_t *pMapDisp = &mapdispinfo[ dispIndex ];
// not solid for this pass
if ( !(pMapDisp->contents & contentsMask) )
continue;
int gridIndex = Disp_GridIndex( pDispInfo );
AddToGrid( gridIndex, dispIndex );
}
// now make a polysoup for the terrain in each grid
for ( int grid = 0; grid < gDispGridList.Count(); grid++ )
{
int triCount = 0;
CPhysPolysoup *pTerrainPhysics = physcollision->PolysoupCreate();
// iterate the displacements in this grid
for ( int listIndex = 0; listIndex < gDispGridList[grid].dispList.Count(); listIndex++ )
{
dispIndex = gDispGridList[grid].dispList[listIndex];
CCoreDispInfo *pDispInfo = &g_CoreDispInfos[ dispIndex ];
mapdispinfo_t *pMapDisp = &mapdispinfo[ dispIndex ];
// Get the material id.
MaterialSystemMaterial_t matID = GetMatIDFromDisp( pMapDisp );
// Get the triangle count.
int nTriCount = pDispInfo->GetTriCount();
if ( nTriCount >= 0xFFFF )
{
// if we hit this error, it's probably time to make the grid adaptive (DISP_GRID_SIZEX,etc)
Error("Terrain collision overflow!\n");
}
// Convert the tristrip into a triangle list.
CUtlVector<unsigned short> indices;
indices.SetSize( nTriCount * 3 );
for ( int iTri = 0; iTri < nTriCount; ++iTri )
{
unsigned short iVert0, iVert1, iVert2;
pDispInfo->GetTriIndices( iTri, iVert0, iVert1, iVert2 );
indices[iTri*3] = iVert0;
indices[iTri*3+1] = iVert1;
indices[iTri*3+2] = iVert2;
}
Vector tmpVerts[3];
for ( iTri = 0; iTri < nTriCount; ++iTri )
{
float flAlphaTotal = 0.0f;
for ( int iTriVert = 0; iTriVert < 3; ++iTriVert )
{
pDispInfo->GetVert( indices[iTri*3+iTriVert], tmpVerts[iTriVert] );
flAlphaTotal += pDispInfo->GetAlpha( indices[iTri*3+iTriVert] );
}
int nProp = g_SurfaceProperties[texinfo[pMapDisp->face.texinfo].texdata];
if ( flAlphaTotal > DISP_ALPHA_PROP_DELTA )
{
int nProp2 = GetSurfaceProperties2( matID, "surfaceprop2" );
if ( nProp2 != -1 )
{
nProp = nProp2;
}
}
int nMaterialIndex = RemapWorldMaterial( nProp );
physcollision->PolysoupAddTriangle( pTerrainPhysics, tmpVerts[0], tmpVerts[1], tmpVerts[2], nMaterialIndex );
}
}
// convert the whole grid's polysoup to a collide and store in the collision list
CPhysCollide *pCollide = physcollision->ConvertPolysoupToCollide( pTerrainPhysics );
if ( pCollide )
{
collisionList.AddToTail( new CPhysCollisionEntryStaticMesh( pCollide, NULL ) );
}
// now that we have the collide, we're done with the soup
physcollision->PolysoupDestroy( pTerrainPhysics );
}
}
// adds all displacement faces as a series of convex objects
// UNDONE: Only add the displacements for this model?
void Disp_AddCollisionModels( CUtlVector<CPhysCollisionEntry *> &collisionList, dmodel_t *pModel, int contentsMask)
{
int dispIndex;
// Add each displacement to the grid hash
for ( dispIndex = 0; dispIndex < g_CoreDispInfos.Count(); dispIndex++ )
{
CCoreDispInfo *pDispInfo = g_CoreDispInfos[ dispIndex ];
mapdispinfo_t *pMapDisp = &mapdispinfo[ dispIndex ];
// not solid for this pass
if ( !(pMapDisp->contents & contentsMask) )
continue;
int gridIndex = Disp_GridIndex( pDispInfo );
AddToGrid( gridIndex, dispIndex );
}
// now make a polysoup for the terrain in each grid
for ( int grid = 0; grid < gDispGridList.Count(); grid++ )
{
int triCount = 0;
CPhysPolysoup *pTerrainPhysics = physcollision->PolysoupCreate();
// iterate the displacements in this grid
for ( int listIndex = 0; listIndex < gDispGridList[grid].dispList.Count(); listIndex++ )
{
dispIndex = gDispGridList[grid].dispList[listIndex];
CCoreDispInfo *pDispInfo = g_CoreDispInfos[ dispIndex ];
mapdispinfo_t *pMapDisp = &mapdispinfo[ dispIndex ];
// Get the material id.
MaterialSystemMaterial_t matID = GetMatIDFromDisp( pMapDisp );
// Build a triangle list. This shares the tesselation code with the engine.
CUtlVector<unsigned short> indices;
CVBSPTesselateHelper helper;
helper.m_pIndices = &indices;
helper.m_pActiveVerts = pDispInfo->GetAllowedVerts().Base();
helper.m_pPowerInfo = pDispInfo->GetPowerInfo();
::TesselateDisplacement( &helper );
Assert( indices.Count() > 0 );
Assert( indices.Count() % 3 == 0 ); // Make sure indices are a multiple of 3.
int nTriCount = indices.Count() / 3;
triCount += nTriCount;
if ( triCount >= 65536 )
{
// don't put more than 64K tris in any single collision model
CPhysCollide *pCollide = physcollision->ConvertPolysoupToCollide( pTerrainPhysics, false );
if ( pCollide )
{
collisionList.AddToTail( new CPhysCollisionEntryStaticMesh( pCollide, NULL ) );
}
// Throw this polysoup away and start over for the remaining triangles
physcollision->PolysoupDestroy( pTerrainPhysics );
pTerrainPhysics = physcollision->PolysoupCreate();
triCount = nTriCount;
}
Vector tmpVerts[3];
for ( int iTri = 0; iTri < nTriCount; ++iTri )
{
float flAlphaTotal = 0.0f;
for ( int iTriVert = 0; iTriVert < 3; ++iTriVert )
{
pDispInfo->GetVert( indices[iTri*3+iTriVert], tmpVerts[iTriVert] );
flAlphaTotal += pDispInfo->GetAlpha( indices[iTri*3+iTriVert] );
}
int nProp = g_SurfaceProperties[texinfo[pMapDisp->face.texinfo].texdata];
if ( flAlphaTotal > DISP_ALPHA_PROP_DELTA )
{
int nProp2 = GetSurfaceProperties2( matID, "surfaceprop2" );
if ( nProp2 != -1 )
{
nProp = nProp2;
}
}
int nMaterialIndex = RemapWorldMaterial( nProp );
physcollision->PolysoupAddTriangle( pTerrainPhysics, tmpVerts[0], tmpVerts[1], tmpVerts[2], nMaterialIndex );
}
}
// convert the whole grid's polysoup to a collide and store in the collision list
CPhysCollide *pCollide = physcollision->ConvertPolysoupToCollide( pTerrainPhysics, false );
if ( pCollide )
{
collisionList.AddToTail( new CPhysCollisionEntryStaticMesh( pCollide, NULL ) );
}
// now that we have the collide, we're done with the soup
physcollision->PolysoupDestroy( pTerrainPhysics );
}
}
